<?php

namespace Framework;
use App\Controllers\ErrorController;
use Framework\Middleware\Authorise;

class Router{
    protected $routes=[];

    /**
     * 注册一条路由规则
     * @param string $method
     * @param string $uri
     * @param string $action
     * @param array $middleware
     * @return void
     */
    private function registerRoute($method, $uri, $action, $middleware=[])
    {
        list($controller, $controllerMethod) = explode('@', $action);

        $this->routes[] = [
            'method' => $method,
            'uri' => $uri,
            'controller' => $controller,
            'controllerMethod' => $controllerMethod,
            'middleware' => $middleware
        ];
    }


    /**
     * 添加一个GTE路由
     * 
     * @param string $uri
     * @param string $controller
     * @param array $middleware
     * @return void
     */
    public function addGet($uri,$controller,$middleware=[]){
        $this->registerRoute('GET',$uri,$controller,$middleware);
    }

    /**
     * 添加一个POST路由
     * 
     * @param string $uri
     * @param string $controller
     * @param array $middleware
     * @return void
     */
    public function addPost($uri,$controller,$middleware=[]){
        $this->registerRoute('POST',$uri,$controller,$middleware);
    }

    /**
     * 添加一个PUT路由
     * 
     * @param string $uri
     * @param string $controller
     * @param array $middleware
     * @return void
     */
    public function addPut($uri,$controller,$middleware=[]){
        $this->registerRoute('PUT',$uri,$controller,$middleware);
    }

    /**
     * 添加一个DELETE路由
     * 
     * @param string $uri
     * @param string $controller
     * @param array $middleware
     * @return void
     */
    public function addDelete($uri,$controller,$middleware=[]){
        $this->registerRoute('DELETE',$uri,$controller,$middleware);
    }

    /**
     * 加载错误页面
     * 
     * @param int $httpCode
     * @return void
     */
    public function error($httpCode = 404)
    {
        http_response_code($httpCode);
        loadView("error/{$httpCode}");
        exit;
    }

    /**
     * 执行路由
     * 
     * @param string $uri
     * @return void
     */
    public function route($uri)
    {
        $requestMethod = $_SERVER['REQUEST_METHOD'];

        //检查post中的 _method
        if($requestMethod ==='POST'&&isset($_POST['_method'])){
            //重写请求方法
            $requestMethod=strtoupper($_POST['_method']);
        }

        //拆分目前uri
        $uriSegments = explode('/', trim($uri, '/'));

        foreach ($this->routes as $route) {
            //拆分路由uri
            $routeSegments = explode('/', trim($route['uri'], '/'));

            $match = false;

            //检查拆分后的字符串片段数量是否匹配
            if (count($uriSegments) === count($routeSegments) && strtoupper($route['method'] === $requestMethod)) {
                $params=[];
                $match = true;
                for ($i = 0; $i < count($uriSegments); $i++) {
                    //如果uri不匹配或参数不存在
                    if ($routeSegments[$i] !== $uriSegments[$i] && !preg_match('/\{(.+?)\}/', $routeSegments[$i])) {
                        $match = false;
                        break;
                    }

                    //检查并提取数字
                    if (preg_match('/\{(.+?)\}/', $routeSegments[$i], $matches)) {
                        $params[$matches[1]] = $uriSegments[$i];
                    }
                }
            }
            if ($match) {
                // 获得控制器和控制器方法
                $controller = 'App\\Controllers\\' . $route['controller'];
                $controllerMethod = $route['controllerMethod'];
                
                // 实例化控制器和调用控制器方法
                $controllerInstance = new $controller();
                $controllerInstance->$controllerMethod($params);
                return;
            }
        }

        ErrorController::notFound();
    }
}